摘要:
An integrated circuit device includes a transmitter circuit operable to transmit a timing signal over a first wire to a DRAM. The DRAM receives a first signal having a balanced number of logical zero-to-one transitions and one-to-zero transitions and samples the first signal at a rising edge of the timing signal to produce a respective sampled value. The device further includes a receiver circuit to receive the respective sampled value from the DRAM over a plurality of wires separate from the first wire. In a first mode, the transmitter circuit repeatedly transmits incrementally offset versions of the timing signal to the DRAM until sampled values received from the DRAM change from a logical zero to a logical one or vice versa; and in a second mode, it transmits write data over the plurality of wires to the DRAM according to a write timing offset generated based on the sampled values.
摘要:
A memory device having a memory core is described. The memory device includes a clock receiver circuit, a first interface to receive a read command, a data interface, and a second interface to receive power mode information. The data interface is separate from the first interface. The second interface is separate from the first interface and the data interface. The memory device has a plurality of power modes, including a first mode in which the clock receiver circuit, first interface, and data interface are turned off; a second mode in which the clock receiver is turned on and the first interface and data interface are turned off; and a third mode in which the clock receiver and first interface are turned on. In the third mode, the data interface is turned on when the first interface receives the command, to output data in response to the command.
摘要:
A memory controller has an interface to convey, over a first set of interconnect resources: a first command that specifies activation of a row of memory cells, a second command that specifies a write operation directed to the row of memory cells, a bit that specifies whether precharging will occur in connection with the write operation, a code that specifies whether data mask information will be issued in connection with the write operation, and if the code specifies that data mask information will be issued, data mask information that specifies whether to selectively write portions of write data associated with the write operation. The memory controller interface further conveys, over a second set of interconnect resources, separate from the first set of interconnect resource, the write data.
摘要:
A memory device having a memory core is described. The memory device includes a clock receiver circuit, a first interface to receive a read command, a data interface, and a second interface to receive power mode information. The data interface is separate from the first interface. The second interface is separate from the first interface and the data interface. The memory device has a plurality of power modes, including a first mode in which the clock receiver circuit, first interface, and data interface are turned off; a second mode in which the clock receiver is turned on and the first interface and data interface are turned off; and a third mode in which the clock receiver and first interface are turned on. In the third mode, the data interface is turned on when the first interface receives the command, to output data in response to the command.
摘要:
A memory device having a memory core is described. The memory device includes a clock receiver circuit, a first interface to receive a read command, a data interface, and a second interface to receive power mode information. The data interface is separate from the first interface. The second interface is separate from the first interface and the data interface. The memory device has a plurality of power modes, including a first mode in which the clock receiver circuit, first interface, and data interface are turned off; a second mode in which the clock receiver is turned on and the first interface and data interface are turned off; and a third mode in which the clock receiver and first interface are turned on. In the third mode, the data interface is turned on when the first interface receives the command, to output data in response to the command.
摘要:
A signaling system includes a signaling path, a master device coupled to the signaling path, a slave device coupled to the signaling path, and a clock generator. The slave device includes timing circuitry to generate an internal clock signal having a phase offset relative to a clock signal supplied by the clock generator, the phase offset being determined at least in part by a signal propagation time on the signal path.
摘要:
A memory device having a memory core is described. The memory device includes a clock receiver circuit, a control interface, a data interface, a delay locked loop circuit, a read pipeline circuit and a circuit to provide an internal clock signal. The clock receiver circuit receives an external clock signal. The control interface receives a command that specifies a read operation to the memory device. The data interface transfers data between the memory device and an external set of signal lines. The delay locked loop circuit, coupled to the clock receiver circuit, to generate the internal clock signal using the external clock signal. The read pipeline circuit provides read data accessed from the memory core to the data interface. The circuit provides the internal clock signal to the read pipeline circuit in response to receipt of the command that specifies the read operation.
摘要:
An integrated circuit memory device includes a memory core to store write data, a first set of interconnect resources to receive the write data, and a second set of interconnect resources to receive a write command associated with the write data. Information indicating whether mask information is included with the write command, wherein the mask information, when included in the write command, specifies whether to selectively write portions of the write data to the memory core.
摘要:
A signaling system includes a signaling path, a master device coupled to the signaling path, a slave device coupled to the signaling path, and a clock generator. The slave device includes timing circuitry to generate an internal clock signal having a phase offset relative to a clock signal supplied by the clock generator, the phase offset being determined at least in part by a signal propagation time on the signal path.
摘要:
A method and apparatus for adjusting the performance of a memory system is provided. A memory system comprises a master device and a slave device. A memory channel couples the master device to the slave device such that the slave device receives the system operating information from the master device via the memory channel. The slave device further includes means for tuning circuitry within the slave device such that the performance of the memory system is improved.